nonsense vs decoration

nonsense and decoration both are nouns.

Word	Noun	Adjective	Verb	Adverb
nonsense	Yes	Yes	No	No
decoration	Yes	No	No	No

As nouns, decoration is a hypernym of nonsense; that is, decoration is a word with a broader meaning than nonsense:

Other hypernyms of nonsense include ornament, ornamentation.

nonsense (noun)	decoration (noun)
ornamental objects of no great value	the act of decorating something (in the hope of making it more attractive)
a message that seems to convey no meaning	something used to beautify
	an award for winning a championship or commemorating some other event

nonsense (adjective)	decoration (adjective)
having no intelligible meaning